Optimizing multi-parameter distributed fiber sensors: a hybrid Rayleigh-Brillouin-Raman System approach

초록

An optimized single-end hybrid Rayleigh, Brillouin, and Raman distributed fiber sensing system has been developed for simultaneous measurement of multiple parameters. This system integrates 3-bit pulse coding for the Raman signal and the Brillouin amplification of the Rayleigh-backscattered signal, discriminating strain, temperature, and vibration using a single sensing fiber. Hybrid Rayleigh-Brillouin-Raman distributed sensing system: Coded pulse pairs are employed for simultaneously measuring vibration, strain and temperature distributions, through an optimized detection scheme of Rayleigh, Brillouin, and Raman scatterings.